soc: snps: vpx5: no -Hccm compiler option for userspace

With -Hccm, the linker automatically moves stuff in RODATA
section into DATA section. Our current kobject related
scripts cannot accommodate this, resulting in space not
being reserved correctly. So for now, disable -Hccm
compiler option if userspace is enabled.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>